I think you're misunderstanding a thought here. It's of no offence if we invest on coins while considering its future potentials.
Investors abilities of carrying out researches before Investing their funds as subjected is all about figuring the future value of the coin if it'd dump or pump. But let's understand that cryptocurrencies are highily volatile which means there's bearish and bullish in the markets. So, having the insight of your coin gets on continues running in bullish with no bearish movement is a doom for such investors because market sentiments is always overwhelming based on demands and supplies including investors on Fomo selling at hastes.
It is not wrong to follow some signals, but most of the time, they are misleading. So if you do your own due diligence, you will understand more what's happening about the coin that you are trading with and may come up with better decisions when it comes to executing the trade.
When we are beginning, maybe this trading signal groups can help, but we all know later that some might be just scamming us or using noobs to make more money for them and for their group.
And so as we gain that experienced, maybe it's better to stay away from this pump, and simply learn TA. Or others might have the hunch to sell at the top before following a correction. Just basing everything on fundamentals might also be a big help. And the thing with this signal groups, you really don't know when they are going to tell you when you sell. With the time difference, maybe you are sleeping when everyone is dumping and so you are going to be trappe and can't exit without suffering any lost.